We are on the cusp of the sixth mass extinction, as estimated the event to be occurring within 2200 years. Scientists have evidences supporting this statement with the extinction rates and magnitudes, and comparing the present conditions to the past “Big Five”—the previous five mass extinction events. Mass extinction is generally known as the forever disappearance of 75% of lives in the globe, therefore species lost is the main driver of such extinction events. With the current high extinction rates and increasing trend of extinction magnitudes, the sixth mass extinction is expected. Such event is mainly due to human impacts: pollution, over extracting of resources, invasion of non-native species, leading to abnormal changes in the Earth system, for instant causing a rapid and anthropogenic increase in atmospheric carbon dioxide level or coextinction of species. With the current situation, the sixth mass extinction might be similar to the Permian mass extinction event, the most disastrous in the past 540 million years. Human may also face extinction, expecting a rapid decrease in human population within several decades.
As titled: Are We On The Cusp Of The Sixth Mass Extinction Event? Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. And it is estimated that the event may occur as fast as 240-540 years (Barnosky et al., 2011). Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many gr...
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...h mass extinction of animals, Science, 331, 6021:1119-1120
Barnosky, A.D.; Matzke, N.; Tomiya, S.; Wogan, G. O. U.; Swartz, B; Quental, T. B; Marshall, C.; McGuire, J. L.; Lindsey, E. L.; Maguire, K. C; Mersey, B.; Ferrer, E. A.. (2011), Has the Earth’s sixth mass extinction already arrived? , Nature, 471: 51-57
Dunn, R. R; Harris, N. C; Colwell, R. K; Koh, L. P; Sodhi, N. S (2009), The sixth mass coextinction: are most endangered species parasites and mutualists?, Proceddings Of The Royal Society B, 276: 3037-3045
Feulner, G. (2009), Climate Modelling of Mass-Extinction Events: A Review, Int. J. Astrobiology, 8: 207-212.
Haamble, C; Henderson. M. R (2011), Extinction rates, extinction-prone habitats, and indicator groups in Britain and at large scales, Biological Conservation, 144: 713-721
Jenkins, M. (2003), Prospect for Biodiversity, Science, 302: 1175-1177
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- As titled: Are We On The Cusp Of The Sixth Mass Extinction Event. Yes, we are indeed, as we, here defined as all the lives on the Earth at the moment. Mass extinction is times when the Earth loses more than three-quarters of its species in a geologically short interval (Barnosky et al., 2011). In addition, according to the Oxford Dictionary of Geology and Earth Sciences edited by Michael Allaby (2013), mass extinction is defined as the Earth has been taken place environmental catastrophe, removes many groups from environment from record and not replaced, and ecosystems collapse.... [tags: environmental catastrophe, Geology]
608 words (1.7 pages)
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- The Sixth Extinction, a novel written by Elizabeth Kolbert, describes that the planet has been through five major extinctions. The book also makes the argument that it is currently in the midst of a sixth. The cause of this most recent extinction, according to the author and her findings in this book, is humans. Though she does not come right out and say that mankind is responsible for this phenomenon, the point becomes clear as you read along chapter to chapter. Kolbert proves this point by writing about a specific instance in each chapter in which a species is going extinct or is already extinct due to human impact.... [tags: Carbon dioxide, PH, Carbon, Marine biology]
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- Humans are very quickly dominating the globe. Today, the human population is around 7 billion people. Humans are populating at a rate of almost 220,000 per day. Humans are rapidly heading towards Earth’s carrying capacity. Earth has gone through five fully major extinctions before. We currently are in the process of Earth’s sixth mass extinction. This mass extinction is closely related in severity to the extinction of the dinosaurs. Earth’s extinctions are broken into three different areas. The first area was the large number of animals caught by hunter-gathers.... [tags: World population, Overpopulation, Human]
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1257 words (3.6 pages)
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2446 words (7 pages)
- The History of Earth's Mass Extinctions The four billion year history of earth has witnessed five mass extinctions, and some scientists believe that we are on the verge of the sixth.1 If we are in the midst of the next mass extinction, we are in the very early stages of an evolving, and escalating process. The most recent, or fifth mass of the extinctions occurred 65 million years ago at the boundary between the Cretaceous and Tertiary periods. Images of an asteroid colliding with the planet, decimating the dinosaur population have been in circulation since the early 80’s.2 Being the most recent mass extinction, thousands of scientists around the world have investigated it, and el... [tags: Anthropology Essays Paleontology Papers]
1621 words (4.6 pages)